Service manual

Service Call Conditions
SM 6-23 M052/M053/M054
Trouble-
shooting
857 D USB I/F Error
The USB driver is unstable and generated an
error. The USB I/F cannot be used. The USB
driver can generate three types of errors: RX,
CRC, and STALL errors. Only the STALL error
can generate this SC code.
 USB 2.0
disconnected
 Controller board
defective
858 A Data encryption conversion error
A serious error occurred during data encryption.
0 A Key acquisition error  Replace the controller board
1 A HDD key setting error
 Turn the machine power off/on
 If the error reoccurs, replace the controller
board
2 A NVRAM read/write error  Replace the NVRAM
30 A NVRAM error
 Turn the machine power off/on
 If the error reoccurs, replace the controller
board
31 A Other error  See SC991
859 B HDD data encryption error
Encryption of data on the hard disk failed.
8 B HDD check error  Format the HDD
6 B
Power loss during
encryption
 Format the HDD
10 B Data read/write error  See SC863 below